Kramer Electronics, Ltd.
Preliminary
USER MANUAL
Model:
910
Digital Audio Preamplifier
Contents
i
Contents
1 Introduction 1
2 Getting Started 1
2.1 Quick Start 2
3 Overview 3
4 Your 910 Digital Audio Preamplifier 3
5 Installing the 910 in a Rack 7
6 Connecting the 910 Digital Audio Preamplifier 8
6.1 Connecting the RS-232 Port 9
6.2 Connecting the ETHERNET Port 9
6.2.1 Connecting the ETHERNET Port Directly to a PC (Crossover Cable) 10
6.2.2 Connecting the ETHERNET Port via a Network Hub (Straight Through Cable) 11
6.2.3 Configuring the Ethernet Port 11
6.3 Connecting via USB 13
6.4 Connecting a Microphone to the XLR Input 13
7 Operating the 910 Digital Audio Preamplifier 14
7.1 Using the Front Panel Buttons 14
7.1.1 Using MIX 14
7.1.2 Using Loudness 14
7.1.3 Using Talkover 14
7.1.4 Using Store 14
7.1.5 Using Recall 14
7.2 Controlling the 910 from the PC 16
7.3 Using the Infrared Remote Controller 16
7.4 Updating the 910 Firmware 16
8 Technical Specifications 17
9 Protocol 3000 Syntax 18
9.1 Host Message Format 18
9.1.1 Simple Command 18
9.1.2 Command String 18
9.2 Device Message Format 18
9.2.1 Device Long Response 18
10 910 Commands in Protocol 3000 19
10.1 Help Commands 19
10.2 Device Initiated Messages 19
10.3 Result and Error Codes 19
10.4 Basic Routing Commands 20
10.5 Preset Commands 20
10.6 Audio Parameter Commands 21
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Contents
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10.7 Identification Commands 22
10.8 Network Setting Commands 22
10.9 Machine Information Commands 23
10.10 Command Terms 23
10.11 Entering Commands 24
10.12 Command Forms 24
10.13 Command Chaining 24
10.14 Maximum Str ing Length 25
10.15 Backward Support 25
Figures
Figure 1: 910 Dig ital A udio Pream plifie r 4
Figure 2: Connecting the 910 Digital Audio Preamplifier 9
Figure 3: Local Area Connection Properties Window
10
Figure 4: Internet Protocol (TCP/IP) Properties Window
11
Figure 5: Connect Screen
12
Figure 6: Device P r operties Screen 13
Figure 7: Connecting a Microphone to the XLR Input
13
Figure 8: 910 Control Application Screen
16
Tables
Table 1: 910 Digital Audio Preamplifier Functions 5
Table 2: 910 Front Panel Button Functions
15
Table 3: 910 Technical Specifications 17
Introduction
1
1 Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been
providing a world of unique, creative, and affordable solutions to the vast
range of problems that confront the video, audio, presentation, and
broadcasting professional on a daily basis. In recent years, we have
redesigned and upgraded most of our line, ma king the best even b etter! Our
1,000-plus different models now appear in 11 groups
1
Thank yo u for purchasing the Kra mer 910 Digital Audio Preamplifier,
which is ideal for:
that are clearly
defined by function.
• Professional aud io applications
• Sound studios
• Boardrooms and classrooms
• Training applications
Each package includes the following items:
• The 910 Digital Audio Pre amplifier
• Power cord
2
• RC-IR2 remote control transmitter
• Windows
®
-based Kramer control software
• This user manual
3
2 Getting Started
We recommend that you:
• Unpac k the equipment car efully and save the original box a nd
packaging materials for possible future shipment
• Review the contents of this user manual
• Use Kramer high-performance high-resolution cables
4
1 GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Matrix Switchers; GROUP 3: Control Systems;
GROUP 4: Format/Standards Converters; GROUP 5: Range Extenders and Repeaters; GR OUP 6: Specialty AV Products;
GROUP 7: Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9: Room Connectivity;
GROUP 10: Accessories and Rack Adapters; GROUP 11: Sierra Products
2 We recommend that you use only the power cord supplied with this device
3 Download up-to-date Kramer user manuals from http://www.kramerelectronics.com
4 The complete list of Kramer cables is available from http://www.kramerelectronics.com
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Getting Started
2
2.1 Quick Start
This quick start chart summarizes the basic setup and operation steps.
Overview
3
3 Overview
The 910 is a high-performance stereo audio preamplifier. It accepts
balanced and unbalanced stereo audio, S/PDIF digital audio, and
microphone inputs, processes the signals, and outputs the m to balanced,
unbalanced and S/PDIF outputs.
The 910 has the fo l lowing features:
• Grouped audio controls: volume, balance, bass, mid, treble,
loudness, equalizer, delay, mute, expand and compress
• Selectable condenser or dynamic mic input with talk over, mix and
override controls
• A 24-character by 2-line LCD display
• Memory locations that store up to 4 presets to be recalled and
executed when needed
• A USB port for software upgrades
• Flexible control options including the front panel, RS-232 (with
Windows®-based control software included), Ethernet and IR
• Standard 19” rack mount size of 1U with rack "ears" included
To achieve the best performance:
• Use only good quality connection cables
1
• Avoid interference from neighboring electrical appliances that may
adversely influence signal quality and position your Kramer 910
away from moisture, excessive sunlight and dust
to avoid interference,
deterioration in signal q uality due to poor matching, and elevated
noise levels (often associa te d with low quality cables).
4 Your 910 Digital Audio Preamplifier
Figure 1 and Table 1 define the unit.
1 Available from Kramer Electronics on our Web site at http://www.kramerelectronics.com
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Your 910 Digital Audio Preamplifier
4
Figure 1: 910 Digital Audio Preamplifier
Your 910 Digital Audio Preamplifier
5 5
Table 1: 910 Digital Audio Preamplifier Functions
#
Feature
Function
1 IR Receiver The red LED illuminates when receiving signals from the infrared
remote control transmitter
2 MUTE Button Press to toggle between turning off (muting) and turning on the
audio output
3 INPUT Selector Buttons Press a button to select an input (1 to 4)
4 MID Button Press to adjust midrange frequencies on the selected input
5 BASS Button Press to adjust low frequencies on the selected input
6 TREBLE Button Press to adjust high frequencies on the selec ted in put
7 LOUDNESS Button Press to toggle loudness on the selected input
8 EQUALIZER Button Press to adjust 7 different frequency bands on the selected input;
each press advances to the next band
9 VOLUME Button Press to adjust the output volume; to a dj ust th e in put vol ume
press VOLUME and STORE together
10 BALANCE Button Press to change the relative volume between the left and right
channels on the selected input
11 DELAY Button Press to adjust the delay in milliseconds on th e output
12 MIX Button Press to choose multiple inputs
13 TALKOVER Button Press to allow the microphone to interrupt the selected input, the
background audio fades out when the microphone is loud enough
and fades in when the microphone is silent again
14 EXPAND Button Press to increase the dynamic range of the output
15 COMPRESS Button Press to decrease the dynamic range of the output
16 STORE Button Press to save the device settings; us e the adju s tm ent knob or the
input buttons to select the preset number
17 RECALL Button Press to bring back a stored preset, use the adjustment knob or
the input buttons to select the preset number
18 DISPLAY 2 line, 24 character LCD display
19 Adjustment Knob Turn to adjust the value of the selected function
20 INPUT 1 (LEFT, RIGHT) RCA
Connectors
Connect to an unbalanced stereo audio source
21 INPUT 2 Terminal Block
Connector
Connect to a balanced stereo audio source
22 INPUT 3 S/PDIF RCA
Connector
Connect to a digital audio source
23 INPUT 4 MIC XLR Connector Connect to a microphone. The XLR connector provides 15V
phantom power when the MIC switch is set for a condenser
microphone
24 MIC MODE (DYN/COND.)
Pushbutton
Press IN for dynamic mic, set OUT for condenser mic
25 OUTPUT 1 (LEFT, RIGHT)
RCA Connectors
Connect to an unbalanced stereo audio acceptor (power
amplifier)
26 OUTPUT 2 Terminal Block
Connector
Connect to an balanced stereo audio acceptor (power amplifier)
27 OUTPUT 3 S/PDIF RCA
Connector
Connect to a digital audio acceptor (digital power amplifier)
28 PROGRAM Switch Slide down to upgrade the device firmware (see section 7.4); slide
up for normal operation
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Your 910 Digital Audio Preamplifier
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#
Feature
Function
29 FACTORY DEFAULT Button Press to revert to the default settings, including all the configured
buttons
30 USB (PROGRAM) Connector Connect to the PC using a USB cable for remote control
31 RS-232 9-pin D-sub (F) Port Connect to the R S-23 2 c onne ctor o n the AV equipment or a P C or
other serial c ont rolle r for remote control
32 ETHERNET RJ-45 Conne ctor Connects to the PC or other serial con troller through co mputer
networking LAN for remote control
33 Power Connector with Fuse
AC connector enabling power supply to the 910
34 Power Switch Illuminated switch for turning the unit ON and OFF
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